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Figure 5 | BMC Bioinformatics

Figure 5

From: Social tagging in the life sciences: characterizing a new metadata resource for bioinformatics

Figure 5

The number of MeSH subject descriptors assigned per PubMed citation by MEDLINE. The figure provides a probability density histogram of the number of MeSH subject descriptors assigned per PubMed citation. The peak (just under a density of 0.1) is at 10 descriptors with a near-normal (skewed slightly towards 0) distribution falling away from that maximum to negligible numbers of descriptors at 1 tag per document and about 26 tags document. The one exception to the smooth distribution is an outlier group at zero descriptors per citation with a density of approximately 0.025.

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